Alert archive / Maryland / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 63, NWS Philadelphia/Mount Holly

June 21, 2016Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2016, 2:55 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 65 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 21, 2016, 2:55 PM EDT (18:55 UTC)
Expired
Jun 21, 2016, 4:00 PM EDT
In force
65 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 18:57 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 21, 3:15 PM EDTTSTM WND DMGCordova, MDTREES AND WIRES DOWN.
Jun 21, 3:45 PM EDTTSTM WND DMGHillsboro, MDTREES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 21, 1:06 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.9 hours before the alert went out and 76 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2016-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2016-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1292 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1267 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

As transmitted.

227 
WUUS51 KPHI 211855 RRA
SVRPHI
DEC001-005-MDC011-035-041-212000-
/O.NEW.KPHI.SV.W.0063.160621T1855Z-160621T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
255 PM EDT TUE JUN 21 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
  NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
  TALBOT COUNTY IN EASTERN MARYLAND...
  CENTRAL QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  CAROLINE COUNTY IN EASTERN MARYLAND...

* UNTIL 400 PM EDT

* AT 255 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR STARKEY CORNER TO NEAR KENT POINT...MOVING
  SOUTHEAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CENTERVILLE...CENTREVILLE...HOPE...CARVILLE...STARKEY CORNER AND
  STARR AROUND 300 PM EDT. JUMPTOWN AROUND 305 PM EDT.
  OAKLAND...RIDGELY AND COPPERVILLE AROUND 310 PM EDT. DENTON AND
  GREENSBORO AROUND 315 PM EDT. EASTON AROUND 320 PM EDT. TRAPPE AND
  HAMBLETON AROUND 325 PM EDT. WINDYHILL AND TANYARD AROUND 330 PM
  EDT. PRESTON...CHOPTANK AND ANDREWSVILLE AROUND 335 PM EDT. 

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
QUEENSTOWN...GALESTOWN...GREENWOOD...HILLSBORO...FARMINGTON...BLADES
AND DOMINION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3886 7626 3879 7620 3879 7619 3895 7621
      3892 7633 3884 7637 3890 7637 3914 7602
      3880 7538 3879 7538 3852 7570 3869 7577
      3868 7593 3857 7604 3876 7622 3871 7628
      3878 7629 3877 7632 3867 7634 3876 7638
TIME...MOT...LOC 1855Z 297DEG 33KT 3909 7598 3880 7639 

HAIL...1.00IN
WIND...60MPH
 
$$

ROBERTSON
1 follow-up statement
628 
WWUS51 KPHI 211929
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
329 PM EDT TUE JUN 21 2016

DEC001-005-MDC011-035-041-212000-
/O.CON.KPHI.SV.W.0063.000000T0000Z-160621T2000Z/
KENT DE-SUSSEX DE-TALBOT MD-QUEEN ANNE'S MD-CAROLINE MD-
329 PM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHWESTERN KENT...NORTHWESTERN SUSSEX...TALBOT...SOUTHERN QUEEN
ANNE'S AND CAROLINE COUNTIES...

AT 328 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR HARRINGTON TO TRAPPE...MOVING SOUTHEAST AT 40
MPH.

HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE 
         TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
         ROOFS...AND OUTBUILDINGS. 

THESE SEVERE STORMS WILL BE NEAR...
  ANDREWSVILLE AROUND 335 PM EDT. 
  ELLENDALE AROUND 350 PM EDT. 

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
GREENWOOD...HILLSBORO...FARMINGTON AND BLADES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3890 7637 3891 7636 3885 7636 3879 7620
      3893 7620 3894 7627 3905 7585 3879 7538
      3852 7570 3864 7571 3869 7577 3871 7584
      3868 7594 3857 7604 3876 7622 3871 7628
      3878 7629 3877 7632 3867 7634
TIME...MOT...LOC 1928Z 297DEG 33KT 3895 7564 3866 7605 

HAIL...1.00IN
WIND...70MPH
 
$$

ROBERTSON

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 3:37 AM EDTSpecial Weather StatementPHICaroline83 min
Jun 21, 1:52 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's53 min
Jun 21, 2:08 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot67 min
Jun 21, 2:17 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's58 min
Jun 21, 2:32 PM EDTTornado WarningPHIKent, Queen Anne's, Talbot28 min
Jun 21, 2:51 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's54 min
Jun 21, 3:36 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot54 min
Jun 21, 3:52 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot53 min
Jun 21, 6:36 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot54 min
Jun 21, 7:20 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's40 min
Jun 21, 4:28 PM EDTSpecial Weather StatementPHISussex62 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2016Severe Thunderstorm Warnings in Delaware, 2016Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.